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See Homepage. This page: Find out more about the 'NK' series of registration numbers, used in the Hertfordshire area.

NK series of older car registration numbers.

Registration letters >> NK series
This page lists registration number codes from the NK series, a series allocated to the Hertfordshire area. Also included, where known, are the date periods that these car registration numbers were used in. The data covers the period of 1900 through to 1972, so registrations seen on later cars wouldn't necessarily be included in this information.

Interpreting a car's registration number.

The majority of post-war car numbers incorporate a three letter code - where this is the case, letters 2 and 3 signify the location code. So, for instance, a car with the registration number 638 GNK or TNK 512D would be a Hertfordshire-issued number. A car with just two letters, ie NK, would also be from this area. Listed below are the known NK series registrations, with added information (where available) describing when each series was first used, and in a few cases, when it came to an end. Some letter codes were used for more than one period during the 20th Century. This information can be invaluable when trying to date vehicles seen in old photographs, or in old films for instance.
Also if your car has lost it's original registration, perhaps sold off by a previous owner as a "cherished" number, this information will help you find a suitable replacement, or at least identify which series would be suitable, based on the age of your car and where it was first registered.
NK Registrations - Hertfordshire.
Reg. Letters Year Letter Start -> End Date (if known)
ANK K OCT 1971 ->
ANK F NOV 1967 ->
ANK B MAR 1964 ->
ANK JUN 1934 ->
ANK MAY 1957 ->

BNK K DEC 1971 ->
BNK G AUG 1968 ->
BNK F MAY 1968 ->
BNK B APR 1964 ->
BNK MAR 1936 ->
BNK OCT 1957 ->

CNK K FEB 1972 ->
CNK F MAR 1968 ->
CNK B MAY 1964 ->
CNK MAY 1938 ->
CNK MAR 1958 ->

DNK K MAR 1972 ->
DNK F MAY 1968 ->
DNK B JUL 1964 ->
DNK OCT 1937 ->
DNK JUN 1958 ->

ENK K MAY 1972 ->
ENK G AUG 1968 ->
ENK F JUN 1968 ->
ENK B SEP 1964 ->
ENK NOV 1938 ->
ENK NOV 1958 ->

FNK K JUN 1972 ->
FNK G AUG 1968 ->
FNK C JAN 1965 ->
FNK B NOV 1964 ->
FNK MAY 1940 ->
FNK FEB 1959 ->

GNK L AUG 1972 ->
GNK K JUL 1972 ->
GNK G NOV 1968 ->
GNK C JAN 1965 ->
GNK FEB 1946 ->
GNK MAY 1959 ->

HNK L AUG 1972 ->
HNK G FEB 1969 ->
HNK C MAR 1965 ->
HNK JAN 1947 ->
HNK JUL 1959 ->

JNK L OCT 1972 ->
JNK G MAR 1969 ->
JNK C APR 1965 ->
JNK NOV 1947 ->
JNK MAY 1960 ->

KNK L NOV 1972 ->
KNK G MAY 1969 ->
KNK C JUN 1965 ->
KNK FEB 1949 ->
KNK JUN 1961 ->

LNK L JAN 1973 ->
LNK H AUG 1969 ->
LNK C SEP 1965 ->
LNK DEC 1949 ->
LNK JUN 1962 ->

MNK H SEP 1969 ->
MNK D JAN 1966 ->
MNK C NOV 1965 ->
MNK DEC 1950 ->
MNK SEP 1962 ->

NK JAN 1921 -> APR 1925
NK SEP 1960 ->

NNK H DEC 1969 ->
NNK F AUG 1967 ->
NNK E JAN 1967 ->
NNK D FEB 1966 ->
NNK NOV 1951 ->
NNK NOV 1962 ->

ONK H FEB 1970 ->
ONK D MAR 1966 ->
ONK SEP 1952 ->

PNK H APR 1970 ->
PNK D APR 1966 ->
PNK JUN 1953 ->
PNK MAR 1963 ->

RNK M AUG 1973 ->
RNK L JUL 1973 ->
RNK H JUN 1970 ->
RNK D JUN 1966 ->
RNK FEB 1953 ->
RNK APR 1963 ->

SNK M AUG 1973 ->
SNK J AUG 1970 ->
SNK E JAN 1967 ->
SNK D SEP 1966 ->
SNK JUN 1954 ->
SNK JUN 1963 ->

TNK M OCT 1973 ->
TNK J OCT 1970 ->
TNK E JAN 1967 ->
TNK NOV 1954 ->
TNK AUG 1963 ->

UNK M NOV 1973 ->
UNK J DEC 1970 ->
UNK E JAN 1967 ->
UNK APR 1955 ->
UNK OCT 1963 ->

VNK J APR 1971 ->
VNK E FEB 1967 ->
VNK SEP 1955 ->
VNK JAN 1964 ->

WNK J MAY 1971 ->
WNK E MAY 1967 ->
WNK FEB 1956 ->

XNK K AUG 1971 ->
XNK J JUL 1971 ->
XNK F AUG 1967 ->
XNK E JUL 1967 ->
XNK JUN 1956 ->

YNK K AUG 1971 ->
YNK F SEP 1967 ->
YNK DEC 1956 ->
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